stagnate

verb

1. 1

   be idle; exist in a changeless situation

   The old man sat and stagnated on his porch

   He slugged in bed all morning

2. 2

   cease to flow; stand without moving

   Stagnating waters

   blood stagnates in the capillaries

3. 3

   cause to stagnate

   There are marshes that stagnate the waters

4. 4

   stand still

   Industry will stagnate if we do not stimulate our economy